UPDATE 3-Turkey's Erdogan: Russian missile defence system to arrive in 10 days -media

* Erdogan says Trump told him no sanctions over S-400 deal

* Most specific timeline yet after Washington's warnings

* U.S. says S-400 would compromise F-35 fighter jets

* Last-ditch hope helps lira firm 1.6% against dollar (Adds more market reaction, analyst comment, context)

By Tuvan Gumrukcu

ANKARA, July 1 (Reuters) - Turkey's President Tayyip Erdogan said Russian S-400 defences would begin arriving within 10 days, Turkish media reported, setting the clock ticking on possible U.S. sanctions after his warm meeting with President Donald Trump on Saturday.

Hard-hit Turkish financial assets jumped on Monday after a weekend in which Erdogan said Trump had told him at a G20 summit there would be no U.S. sanctions, and the U.S. leader said Turkey had been treated unfairly over the missiles deal.

Turkey and the United States, NATO allies, have been at odds over Ankara's decision to purchase the S-400s, with Washington warning of U.S. sanctions if the delivery took place.

Turkey has dismissed the warnings from Congress and Trump's top secretaries, saying it would not back down and holding out hope that the White House could protect it from sanctions that could hit its already soft currency and economy.

Erdogan's comments offered the most specific timeline yet on the delivery of the ground-to-air missiles that U.S. officials have said are not compatible with North Atlantic Treaty Organization (NATO) defences.

"Within 10 days, maybe within one week, the first shipment will have arrived. I told Trump this openly," Erdogan was cited as saying on Sunday by Hurriyet newspaper after his meeting with Trump in Japan.

The United States says the S-400s will compromise its Lockheed Martin Corp F-35 fighter jets, of which Turkey is a producer and buyer. Washington has also formally started the process of expelling Turkey from the F-35 programme, halting the training of Turkish pilots in the United States.

The Turkish lira strengthened 1.6% on Monday to below 5.70 against the dollar, and Turkey's main stock index rallied 2.7%. The dispute over the S-400s has been a key concern for investors this year.

Turkey's economy, the largest in the Middle East, is in recession after a currency crisis last year chopped 30% from the lira and sent inflation and unemployment soaring. The lira has dropped another 8% so far in 2019.

"So (a) green light from Trump to Turkey to go ahead and get S400s -- or that is now the Turkish view," said Tim Ash, senior emerging markets strategist at BlueBay Asset Management.